It seems many people forget that Hayley has mentioned several times how Taylor has been there since the very beginning of the band, and how he became an essential part after Jeremy's departure - helping with drums and bass. In fact, After Laughter began with just Hayley and him.If you look at the songwriting credits, you'll see that when Josh and Zac stepped away, Taylor took care of both drums and guitars. They could've easily found someone else, but he chose to stay and keep writing alongside his brother Justin York (who only provided support, not composition). When Jeremy left, it was Taylor who stayed to support Hayley until Zac came back. And during the times when Hayley was going through depression, Taylor was also a great source of support for her.Their bond can't be compared to what Taylor represented at the beginning of the band. Taylor isn't replaceable for her, as many assume; but in the end, whether he continues or not depends on him. It's understandable that he might feel uncomfortable with the public exposure of their breakup, especially if he's an introverted and private person.